65 lines
3.4 KiB
HTML
65 lines
3.4 KiB
HTML
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<title>std::operator<<(std::error_code)</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_error_error_code_operator_ltlt skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>operator<<<span style="font-size:0.7em; line-height:130%">(std::error_code)</span></h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-error.html">error</a>‎ | <a href="cpp-error-error_code.html">error code</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-system_error.html"><system_error></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">></span><br /></span>
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<p><a href="cpp-io-basic_ostream.html"><span class="kw1715">std::<span class="me2">basic_ostream</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span><br /></p>
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operator<span class="sy1"><<</span><span class="br0">(</span> basic_ostream<span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span> os, <span class="kw4">const</span> error_code<span class="sy3">&</span> ec <span class="br0">)</span><span class="sy4">;</span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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<p>进行 error_code <code>ec</code> 上的流输出操作。</p>
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<p>等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">os <span class="sy1"><<</span> ec.<span class="me1">category</span><span class="br0">(</span><span class="br0">)</span>.<span class="me1">name</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">':'</span> <span class="sy1"><<</span> ec.<span class="me1">value</span></span></span> 。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<table class="t-par-begin">
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<td>os</td>
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<td>-</td>
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<td>要插入数据的输出流</td>
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</tr>
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<tr class="t-par">
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<td>ec</td>
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<td>-</td>
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<td>error_code</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p><code>os</code></p>
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